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https://issues.apache.org/jira/browse/HDFS-9198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14944117#comment-14944117
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Hadoop QA commented on HDFS-9198:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch | 18m 6s | Pre-patch trunk compilation is
healthy. |
| {color:green}+1{color} | @author | 0m 0s | The patch does not contain any
@author tags. |
| {color:green}+1{color} | tests included | 0m 0s | The patch appears to
include 3 new or modified test files. |
| {color:green}+1{color} | javac | 8m 4s | There were no new javac warning
messages. |
| {color:green}+1{color} | javadoc | 10m 22s | There were no new javadoc
warning messages. |
| {color:red}-1{color} | release audit | 0m 15s | The applied patch generated
1 release audit warnings. |
| {color:red}-1{color} | checkstyle | 1m 25s | The applied patch generated 6
new checkstyle issues (total was 424, now 425). |
| {color:green}+1{color} | whitespace | 0m 6s | The patch has no lines that
end in whitespace. |
| {color:green}+1{color} | install | 1m 31s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse | 0m 34s | The patch built with
eclipse:eclipse. |
| {color:red}-1{color} | findbugs | 2m 33s | The patch appears to introduce 1
new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | native | 3m 16s | Pre-build of native portion |
| {color:red}-1{color} | hdfs tests | 200m 1s | Tests failed in hadoop-hdfs. |
| | | 246m 16s | |
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|| Reason || Tests ||
| FindBugs | module:hadoop-hdfs |
| Failed unit tests | hadoop.hdfs.web.TestWebHdfsTimeouts |
| | hadoop.hdfs.security.TestDelegationTokenForProxyUser |
| | hadoop.hdfs.TestParallelRead |
| | hadoop.hdfs.server.namenode.TestDeadDatanode |
| | hadoop.hdfs.web.TestWebHdfsContentLength |
| | hadoop.hdfs.server.blockmanagement.TestPendingReplication |
| | hadoop.hdfs.server.datanode.TestIncrementalBrVariations |
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|| Subsystem || Report/Notes ||
| Patch URL |
http://issues.apache.org/jira/secure/attachment/12765032/HDFS-9198-trunk.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / b925cf1 |
| Release Audit |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/patchReleaseAuditProblems.txt
|
| checkstyle |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/diffcheckstylehadoop-hdfs.txt
|
| Findbugs warnings |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
|
| hadoop-hdfs test log |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/artifact/patchprocess/testrun_hadoop-hdfs.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf904.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output |
https://builds.apache.org/job/PreCommit-HDFS-Build/12794/console |
This message was automatically generated.
> Coalesce IBR processing in the NN
> ---------------------------------
>
> Key: HDFS-9198
> URL: https://issues.apache.org/jira/browse/HDFS-9198
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Affects Versions: 2.0.0-alpha
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-9198-branch2.patch, HDFS-9198-trunk.patch
>
>
> IBRs from thousands of DNs under load will degrade NN performance due to
> excessive write-lock contention from multiple IPC handler threads. The IBR
> processing is quick, so the lock contention may be reduced by coalescing
> multiple IBRs into a single write-lock transaction. The handlers will also
> be freed up faster for other operations.
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